Pressure registering and recording device



L.A.STENGE R.- PRESSURE REGISTERING AND RECORDING DEVICE.

APPLICATION FILED APR. I2, I919.

Patented Aug. 9, 1921.

2 SHEETS-SIIEET I.

L. A. STENGER.

PRESSURE REGISTERING AND RECORDING DEVICE.

' APPLICATION FILED APR. IL 1919.

Patented Aug. 9,1921.

' 2 SHEETS-SHEET PATENT OFFICE. Y

LAURENCE A. STENGER, 01 DENVER, COLORADO.

I PRESSURE REGISTERING AND RECORDING DEVICE.

Specification of Letters Patent.

Patented Aug. 9, 1921.

Original application filed October 14, 1918, Serial No. 257,939. Divided and this application filed April 12, 1919. Serial No. 289,601. 1

To all whom it may concern:

. j Be it known that I, LAURENCE A. STENGER, a citizenof the United States, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Pressure Registering and Recording Devices, of which the following is a specification, reference being had therein to the accompanying drawing.

My inventionrelates to pressure registering and recording means and more particularly to means for registering and automatically recording pressures obtaining at different times without having to load the pressure responsive means with motion transmitting devices, thus eliminating error due to friction'and inertia of such devices.

In the embodiment herein disclosed, I make use of a mercury column as the pressure responsive means, and the device is in the form of means forautomatically registering and recordingthe degree of vacuum in the absorbing chamber of a gas testing machine. However, it will be obvious, after an understanding of the present disclosure, that other, forms of pressure responsive means may be used instead of a mercury column and that the invention is capable ofvarious uses other than the specific one'herein describedfor the purpose of disclosure.

Other' objects of my invention consist.

in certain advantageous arrangements and combinations of parts hereinafter described and specifically pointed out in the claims.

My inventionis illustrated in the accompanying' drawings, in which Figure 1 is" a front elevation of agas'testing machine with my improved registering and recordingmeans applied thereto.

Fig. 2 is a diagrammatic view showing the electro-magnetic recording circuit connections therefor.

Fig. 3 is a vertical section through the gas chamber of a gas testing machine showing the connection of the pressure responsive means therewith and the arrangement ofthe means and the sprocket chain for. operating the recording means. t c

Fig. 4 is a fragmentary, perspective view showing the portion of the carriage 2 0 to which the lifting and depressing lugs are attachedpand the method. of mounting on theguide rods. g p f g I Referring to the drawings in detai1,"-the pressure responsive means is here shown in the form of a mercury gage of the inverted syphon type connected with the gas chamber 12 of a gas testing machine for indicating the degree of vacuum therein. This consists of the gage tube 18 preferably of glass, having a perforated cap 79 of suitable electrical conducting material such as metal, at the top, and connected at the bottom through a connecting block 80 with the tube 81 which leads to the chamber or reservoir 82 having a horizontal area much greater than that of the indicating tube 1 8. From the top of the chamber 82 a connecting tube 83 leads to the interior of the gas chamber 12. As the top of the tube'18 is open to atmosphere, variations of the pressure within the gas chamber 12 will result in'variations in the level of the mercury in the chamber 82 and in the indicating tube 18, the variations of mercury level in the tube 18 being greater than those in the chamber 82 because of the being arranged to remainvertically stationaryand' to be moved horizontally by being unwound from a supply roller'89 onto a storage roller 36 driven by a suitable clock train, not shown, in accordance with the chronometric graduation on the record sheet.

The recording means consists of a carriage 2O suitably mounted on a pair of guide rods 22 in frictional engagement therewith so as to remain in the position last placed. This carriage carries a contact needle 19 insulated from the carriage and arranged to move downwardly through the cap 79 in electrical contact therewith into the gage tube 18, as the carriage moves downwardly. The carriage 20 also carries an armature 21 pivoted on the rod 121 and to which is attached a recording plummet 24 arranged to pass down over the record tablet 26, normallyout of engagement therewith, as the carriage moves downwardly. This armature is made substantially equal in length to the length of travel of the carriage and is aeted upon by a stationary electromagnet 23 mounted so as to be in operative relation to the armature in all positions of the carriage, Fig. 2 being in the nature of a diagram to show certain mechanical and electrical rela tion of parts, the pivotal mounting of the armature 21 is omitted for the sake of clearness. For example the upper portion of the armature is broken away and the lower car 122 sectioned oil as extending outside of the plane of the drawing. The plummet 21 is attached to the armature in any suitable manner as by soldering and in Fig. 2 extends away from the observer. In Fig. 1 it will be observed that the plummet 21 extends to the right of the armature which, being situated between the observer and the magnet 21, is moved in a direction away from the observer when the armature is attracted by the magnet Just above the record supply roller 89 is mounted a changeable inking device 90 so arranged that the plummet 24 will be in operative relation therewith when the carriage is in its uppermost position. The inking device 90 is made in the form of a drum as shown with a plurality of inking pads 25, the device being mounted on a rotatable shaft 152 whereby it may rotate to present diiierent inking pads to the plummet. The shaft 152 is here shown operated by a wheel 153 which for the purpose of the present disclosure may be considered as hand operated. the purpose being to enable different color inks to be used at will. The plummet 24 is mounted on the armature in such manner that when the armature is attracted by the magnet the plummetwill be brought into contact with one oi"; the pads 25 on'the inking device 99 or with the record tablet 26, according to the position of the carriage. Just below the supply roller 39, a cleaning belt 27 is mounted in a manner to be engaged by the plummet when the carriage reaches its lowermost position. The contact 28 is arranged to pen the circuit of the magnet 23, each time the armature 21 is attracted, by the armature striking the insulated stud 190. The movable member of the contact 28 is held against accidental movement in either opened or closed position by means of an oil-center holding device consisting of the leaf spring 91 and link 92-. As the contact member 28 is pivoted at 154: and the point where the spring 91 bears downwardly on the link 92 is stationary, the pivotal connect-ion of the link 92 will be swung from one side to the other of the line connecting the center of the pivot 154 with the point of contact or spring 91 with link 92 in the oscillation of the movable contact member 28 from one side to the other, the downward tension of the spring 91 holding the contact in either position against accidental displacement in a manner which will be well understood. For energizing the magnet 23 upon arrival of the plummet 241 into operative relation with the inking device, a cam 29 is so mounted on the armature 21 as to engage a complementary projection of the movable member of the contacting device 28 just before the armature reaches its uppermost position which partially closes the energizing circuit of magnet 23, which circuit is completed upon closure of the contact 38 adjusted to close upon arrival of the plummet 21 in the exact position for engagement with the inking device. The energizing circuit thus completed may be traced from battery 93 through conductor 941, contact 38, contact needle 19, cap 79, conductor 95, contact 28, conductor 96, magnet 23, conductor 97 back to battery 93. For energizing the magnet 23 to bring the recording plummet 21 into engagement with the record tablet, the energizing circuit of the magnet 23 is completed through the contact of the needle 19 with the mercury column 88 in the tube 18 and may be traced as follows: Battery 93, conductor 9 1, connecting block which is of metal or other conducting material, mercury column 88, contact needle 19, cap 79, conductor 95, contact 28, conductor 96, magnet 23, and back through conductor 97 to battery 93.

To operate the device, I provide asprocket chain 30 driven by the sprocket wheel 109 through the shalt 110 and gearing 31 which may be arranged in any well known manner for varyingthe speed of the shaft 110 in relation to a driving gear 210, Fig. 1. From the driving sprocket 109, the chain passes over the idler sprockets 111,112 and 113 and thence over operating sprockets 114 and 1155 iack to the driving sprocket. The sprocket 111 is furnished to'operate the clean ing belt 27 through the gears 116 arranged to be thrown into mesh upon downward movementof the arm 117, which. is eilected by engagement therewith oi? the lug 118on the carriage 20, the arm 117 and gear shift lever 150 being arranged as shown to formabell-crank lever pivoted at 151, so that downward movement 01 the arm 117 will result in a movement of the gear shift lever 150 to the right thus bringing the gears 116 into mesh. The sprocket 115 is used for the purpose of operating certain parts of the testing machine to which the present recording means is applied and will not be described herein as it forms no'part of the present invention. One link on the sprocket chain 30 is provided with an extension 32 arranged to engage the outer and inner operating lugs 119 and 120 respectively, of the carriage 20, successively, the lower lug 119 being positioned in the same verticalplane as'thedown-going side of the vertical loop in the chain while the inner or upper lug 120 is similarly ositioned in relation to the up-lgoing side 0 the chain,as clearly shown in g- Q v In. operation the sprocket chain 30 travels in the direction indicated by the arrow at the top of Fig.3 and carries the timing extension or lug.32 around with it which upon passing around the sprocket 114 and upwardly to the sprocket 115, engages the lifting lug 120 onthe carriage 20, sliding the carriage upwardly on the guide rods 22.

The carriage 2O continuing its upward movement carries the armature 21 and with it the lug 29. upwardly and into engagement with the lever arm of the contact 28, moving the contact 28 into closed .position as indicatedin Fig. .2 and when the carriage reaches a positionito bring the plummet 24 into the proper position to engage the inking device 90, acontact rod 19'makes con-v tact. with the contact spring 38 which closes the energizing circuit of the magnet 23.

,The magnet 23 upon energization attracts thearmature .21 bringing the plummet 24 into engagement with the inking pad 25, thus inking the plummet. The several pads 25 on the inking device 90 car different colored inks andthe device 90 1s made to turn so as to presentdiflerent pads to the plummetfor the purpose of characterizing different records or groups of records. In the present embodiment this inking device 90 is shown connected to the operating parts of the testing machine which will not be here described as it forms the subject matter of United States Patent No. 1,320,584, granted to me November 4, 1919, of which the present application is a division. For the present it maybe considered as remaining stationary and supplying the same colored ink for all therecords or set by hand at different intervals to characterize the records made between such intervals. Immediately upon the attraction of the armature 21, it engages the insulating stud 190 which swings the contact 28 into open position thus causing the magnet 23 to become de-energized and release the armature 21 which moves the plummet 24 out of engagement with the inking pad 25.

The timing lug now passes over the operating sprockets 115, 109, etc., of the testing mac inc and back to, the left over the sprocket 113. As the timing lug 32 continues its travel downward from the sprocket 113 it engages with the carriage lowering lug 119. As the recorder carriage 20 moves down the lug 29 on the armature 21. again engages the lever arm of the contact 28 moving the contact 28 into the closed position as indicated in Fig. 2, and as the carriage continues its downward movement the contact needle 19 is brought into contact with the mercury in the tube 18 whereupon the circuit of themagnet 23 iscompleted in a manner previouslydescribed, and the armature 21 momentarily attracted to tap the plummet 24 on the record sheet 26 makin a mark at a point on the sheet corresponding to the percentage of carbon dioxid in the sample tested, the mark being of a color indicating the source from which the sample was taken. The carriage continuing to the lower limit of its travel causes the plummet 24 to come in contact with the cleaning belt 27, and the belt clutch 116 to be closed by engagement of thelug 118 with the clutch arm 117 which sets the belt 27 in motion to clean the remaining ink from the plummet.

While I have herein described and illustrated a particular embodiment of my in vention, for the purpose of disclosure, it is to be understood that I do not limit myself to such embodiment but {contemplate all such modifications and variants thereof as may fairly fall within the scope of the appended claims.

Having thus described my invention what I claim and desire to secure by Letters Patent is 1. Pressure recording means comprising an inverted syphon of mercury having one arm open to atmosphere and the other'connected to receive the pressure to be recorded, a moving chronologically marked record tablet, a marker arranged to be moved over the record tablet normally out of engagement therewith, electrically operated means operable to cause said marker to momening means arranged to move in a given ratio to the movement of said marker into contact with the upper surface of the mercury in one of the syphon arms, and an energizing. circuit for said electrically operated means controlled through the contact between the mercury and said contacting means.

2. Pressure recording means comprising a mercury column movable in response to pressure variations, a vertical record tablet, a rigid. carriage mounted to slide in a vertical plane, a stationary electromagnet, an armature pivoted vertically on said carriage in operative relation to said magnet in all positions of the carriage, a marking element carried by said armature arranged to move a mercury column variable in response to variations in the pressure to be measured, a horizontally driven record tablet, an inking device and a marking plummet cleaning device mounted one above and one below said record tablet, a vertically movable carriage, a marking plummet pivotally mounted on said carriage to move vertically across said tablet and into operative relation with said inking and cleaning devices, with the vertical movement of said carriage and to swing horizontally aboutits pivot into and out of engagement with said inking device, said tablet and said cleaning device, a contact rod rigidly mounted on said carriage to move into and out of cont-act with said mercury column, in the movement of the carriage, electro magnetic means operable upon ener ization to cause said plummet to momentarily engage the record tablet or said inking device according to its vertical position, an energizing circuit for said electromagnetic means controlled through said contact and mercury column, a switching device operable to complete said energizing circuit upon the movement of the plummet into operative relation with said inking device, said inking device being arranged to supply different kinds of ink to the plummet at will.

a. Recording means comprising an inking device, a record tablet and a cleaning device with a printing element movable across the tablet "from a position in operative relation with the inking device into engagement with said cleaning device, means operable upon movement of the printing element into operative relation with the inking de vice to move the printing element into con tact with the inking device, meter controlled means operable to move said printing element into contact with the record tablet at a point in its travel thereacross commensurate in extent with the indication of the meter.

5. Recording means comprising a record tablet, a printing element therefor, inking means for said printing element, a meter, means for moving said printing means from said inking device across the record tablet, electromagnetic means operable upon energizatien to more said printing element into contact with said inking device or said tablet according to its position, an energizing circuit {or saidelectromagnetic means, means operable to close the energizing circuit of said electromagnetic means upon movement of the printing element into operative relation with-theinking device, means controlled by said meter for closing said energizing circuit, and means operable upon movement of the printing element toward the tablet or inking device to open said energizing circuit immediately after momentary contact of said printing element with either tablet or inking device.

In testimony whereof I affix my signature.

LAURENCE A. STENGER. 

